Code shared from run.dlang.io.

main.d

import core.thread;                                                                                                                                                                                                     
import std;                                                                                                                                                                                                             
import std.parallelism;                                                                                                                                                                                                 
                                                                                                                                                                                                                        
shared string[string] aa;                                                                                                                                                                                               
                                                                                                                                                                                                                        
void fun() {                                                                                                                                                                                                            
  foreach (i; 0 .. 5) {                                                                                                                                                                                                 
    writeln("fun", i, aa);                                                                                                                                                                                              
    foreach (num; parallel(iota(5))) {                                                                                                                                                                                  
        // writeln(num);                                                                                                                                                                                                
    }                                                                                                                                                                                                                   
    Thread.sleep(5.seconds);                                                                                                                                                                                            
  }                                                                                                                                                                                                                     
}                                                                                                                                                                                                                       
                                                                                                                                                                                                                        
                                                                                                                                                                                                                        
void main() {                                                                                                                                                                                                           
    writeln("start", aa);                                                                                                                                                                                               
    auto aaTemp = [ "abc" : "123" ];                                                                                                                                                                                    
    aa = cast(shared)aaTemp;                                                                                                                                                                                            
    writeln(aa);                                                                                                                                                                                                        
    foreach (num; parallel(iota(5))) {                                                                                                                                                                                  
      auto t = new Thread({fun();}).start();                                                                                                                                                                            
    }                                                                                                                                                                                                                   
}